| Name: | Nimmi Narayanan |
| Affiliation: | Sree Sankara College, Kalady |
| Conference ID : | ASI2023_408 |
| Title : | Determination of UV Diffuse Background Radiation and verification of GALEX Deep and Medium Airglow Model |
| Authors : | Nimmi Narayanan , Department of Physics, Sree Sankara College, Kalady, Ernakulam 683574, India;
nimmi.indhira@gmail.com
Dr. Sujatha N V, Department of Physics, St. Xavier’s College for Women, Aluva 683101, India;
sujathanv@stxaviersaluva.ac.in |
| Mode of Presentation: | Poster |
| Abstract Category : | Instrumentation and Techniques |
| Abstract : | GALEX ultraviolet observations are composed of Foreground emissions and Background radiation. In our previous works, we modeled and estimated Airglow and Zodiacal light, the main Foreground Emissions, using Deep and Medium GALEX Observations. In this work, we extend our research by subtracting these foreground emissions and obtaining the FUV and NUV diffuse sky background radiation. We found these resultant values to have a positive correlation with IR 100 micron intensity as well as with the optical depth. The diffuse sky background also shows cosecant variation with galactic latitudes as proposed in earlier literature work. In addition, we ran a single scattering model with Henyey & Greenstein scattering function for the targets under study, and observed the resultant scattered flux to be highly compatible with the diffuse UV radiation we derived especially in low dense regions. As stellar light scattered by interstellar dust is the main contributor of the diffuse UV background radiation, our derived diffuse UV background radiation values and Airglow model are hence verified by this work.
Keywords: Solar Activity; Astronomical Space missions and instrumentation; ultraviolet:ISM; atmospheric effects
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